This is the problem with Common Names... I googled Houseleeks and got several succulents.... I'd say it's highly likely they are the same thing.

and you can use the goo inside like aloe!

hens and chicks are the same thing as houseleeks i had some problems with that at first to...but i have never heard u can use the goo inside like u can a aloe plant.
that might be useful

Yes they are the same. They used to be used (and still are in some Scandanavian areas) as part of living roofs, hence the name. It was believed to protect the home from lightning. I'm not even sure where the name hens & chicks came from. Historical European texts always call it houseleek. I have heard that the sap can be used the same as aloe as well. I have not tried it myself to confirm.

My mom used to have the hens and chicks in her rock garden. Every once in a while she would seperate the babies. One time, a tall stalk shot up from one, almost a foot tall. Not sure what it was doing, but around here most cactus would have problems dealing with winters. Hens and chicks, however, are quite hardy in Z6.